EXHIBIT 32.1


                                  CERTIFICATION
                                       OF
                             CHIEF EXECUTIVE OFFICER
                                       AND
                             CHIEF FINANCIAL OFFICER
                           PURSUANT TO 18 U.S.C. 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002


     I, Steve Harding,  certify, pursuant to 18 U.S.C. 1350, as adopted pursuant
to Section 906 of the  Sarbanes-Oxley  Act of 2002, that the Quarterly Report on
Form 10-Q of American  Exploration  Corporation  for the quarter  ended June 30,
2009 fully  complies  with the  requirements  of  Section  13(a) or 15(d) of the
Securities Exchange Act of 1934 and that information contained in such Quarterly
Report on Form 10-Q fairly  presents,  in all material  respects,  the financial
condition and results of operations of Sierra Resource Group, Inc.


August 19, 2009


                                            By: /s/ STEVE HARDING
                                                ___________________________
                                                    Steve Harding
                                                    President and
                                                    Chief Executive Officer




     I, Brian Manko, certify, pursuant to 18 U.S.C. 1350, as adopted pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly Report on Form
10-Q of American  Exploration  Corporation  for the quarter  ended June 30, 2009
fully complies with the requirements of Section 13(a) or 15(d) of the Securities
Exchange Act of 1934 and that information  contained in such Quarterly Report on
Form 10-Q fairly presents, in all material respects, the financial condition and
results of operations of Sierra Resource Group, Inc.


August 19, 2009


                                            By: /s/ BRIAN MANKO
                                                ___________________________
                                                    Brian Manko
                                                    Chief Financial Officer




A signed  original of this  written  statement  required by Section 906 has been
provided to American  Exploration  Corporation  and will be retained by American
Exploration  Corporation and furnished to the Securities and Exchange Commission
or its staff upon request.